CN114518686A - Projection system - Google Patents
Projection system Download PDFInfo
- Publication number
- CN114518686A CN114518686A CN202011309815.XA CN202011309815A CN114518686A CN 114518686 A CN114518686 A CN 114518686A CN 202011309815 A CN202011309815 A CN 202011309815A CN 114518686 A CN114518686 A CN 114518686A
- Authority
- CN
- China
- Prior art keywords
- light
- downstream
- light source
- collimating
- projection system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 claims abstract description 32
- 229920000515 polycarbonate Polymers 0.000 claims abstract description 26
- 239000004417 polycarbonate Substances 0.000 claims abstract description 26
- 229920004111 Makrolon® LED2045 Polymers 0.000 claims description 2
- 238000005286 illumination Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000002834 transmittance Methods 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- -1 cyclic olefin Chemical class 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004383 yellowing Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/208—Homogenising, shaping of the illumination light
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
- G02B1/041—Lenses
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2066—Reflectors in illumination beam
Abstract
A projection system comprises a light source, a collimation element, a light homogenizing element, a prism, a light valve and a projection lens; the collimating element is arranged on the downstream of the light path of the light source; the dodging element is arranged on the downstream of the light path of the collimation element; the prism is arranged at the downstream of the optical path of the dodging element; the light valve is arranged on the downstream of the optical path of the prism; the projection lens is arranged at the downstream of the light path of the light valve; at least one of the light homogenizing element and the prism is made of Polycarbonate (Polycarbonate).
Description
Technical Field
The present invention relates to a projection system, and more particularly, to a projection system having a light valve.
Background
The projection system includes a light valve for modulating the illumination beam to generate an image beam for projection on a screen by a projection lens. These light beams usually carry a certain amount of energy in the projection system, and once the light beams are used for a long time, the components inside the projection system are yellowed and deteriorated, so that the overall light transmittance is reduced, and the imaging quality is also affected.
Furthermore, in order to make the elements inside the projection system resistant to short-wave radiation, it is common to add a chemical treatment during manufacture; however, this not only adds extra cost, but also may result in poor surface quality of the device due to poor fabrication, thereby affecting the imaging quality.
Disclosure of Invention
The invention provides a projection system, which is characterized in that the material of specific elements in the projection system is changed into Polycarbonate (Polycarbonate), so that the problem of light transmittance reduction of the elements under long-term irradiation can be solved, and the cost can be effectively saved.
According to an aspect of the present invention, a projection system is provided. The projection system comprises a light source, a collimation element, a light homogenizing element, a prism, a light valve and a projection lens. The collimating element is disposed in the optical path downstream of the light source. The dodging element is disposed in the optical path downstream of the collimating element. The prism is arranged on the downstream of the optical path of the dodging element. The light valve is disposed downstream of the prism in the optical path. The projection lens is disposed downstream of the light valve in the optical path. At least one of the light homogenizing element and the prism is made of Polycarbonate (Polycarbonate).
According to another aspect of the present invention, a projection system is provided. The projection system comprises a light source, a collimation element, a light uniformizing element, a relay lens, a reflection element, a light valve and a projection lens. The collimating element is disposed in the optical path downstream of the light source. The dodging element and the relay lens are arranged on the downstream of the light path of the collimating element. The reflecting element is arranged on the optical path downstream of the dodging element and the relay lens. The light valve is disposed in the optical path downstream of the reflective element. The projection lens is disposed downstream of the light valve in the optical path. At least one of the light uniformizing element and the reflecting element is made of Polycarbonate (Polycarbonate).
The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.
Drawings
Fig. 1 is a top view of a projection system according to an embodiment of the invention.
Fig. 2 is a side view of the architecture of region R in fig. 1.
Reference numerals
100 projection system
111 light source
111a first light source
111b second light source
111c third light source
111d fourth light source
112 collimating element
112a first collimating element
112b second collimating element
112c third collimating element
112d fourth collimating element
113 spectroscopic element
113a first light splitting element
113b second light splitting element
114 relay lens
115 light homogenizing element
116 relay lens
117 reflective element
118 lens
119 reflective element
119a incident prism
119a1 incident surface
119b light-emitting prism
120 light valve
122 protective sheet
130 projection lens
La the first light beam
Lb is the second light beam
Lc third light beam
Ld fourth light beam
I illumination beam
R is a region
M image beam
Detailed Description
The invention will be described in detail with reference to the following drawings, which are provided for illustration purposes and the like:
fig. 1 is a schematic top view of a projection system 100 according to an embodiment of the invention. Projection system 100 may include a light source 111, a collimating element 112, a homogenizing element 115, a lens 118, a reflecting element 119, a light valve 120, and a projection lens 130.
In one embodiment, the number of the light sources 111 may be four, but it should be understood that the invention is not limited thereto. The four light sources 111 are a first light source 111a, a second light source 111b, a third light source 111c and a fourth light source 111d, respectively. The first light source 111a may output a first light beam La, the second light source 111b may output a second light beam Lb, the third light source 111c may output a third light beam Lc, and the fourth light source 111d may output a fourth light beam Ld.
In one embodiment, the first light source 111a may be a blue light diode, and the first light beam La is a blue light. The second light source 111b may be a blue led covered with an excitable green phosphor layer, so that the output second light beam Lb is a green light. The third light source 111c can be a blue led, and the third light beam Lc is blue light. The fourth light source 111d may be a red light diode, and the fourth light beam Ld is a red light. Here, the light source 111 is illustrated by using a light emitting diode as an example, but the invention is not limited thereto. For example, the light source 111 may be other types of light sources, such as a laser diode or other types of light sources.
The collimating element 112 is disposed immediately adjacent to the light source 111, and the collimating element 112 is disposed in the optical path downstream of the light source 111. For example, in one embodiment, the number of collimating elements 112 can be four, but it should be understood that the invention is not limited thereto. The four collimating elements 112 are a first collimating element 112a, a second collimating element 112b, a third collimating element 112c and a fourth collimating element 112d, respectively. The first collimating element 112a is disposed downstream of the first light source 111a in the optical path of the first light beam La. The second collimating element 112b is disposed downstream of the first collimating element 112a and the second light source 111b in the optical path, and is located on the transmission path of the first light beam La and the second light beam Lb. The third collimating element 112c is disposed downstream of the third light source 111c in the optical path of the third light beam Lc. The fourth collimating element 112d is disposed downstream of the fourth light source 111d in the optical path of the fourth light beam Ld. The collimating element 112 is, for example, a plano-convex lens, a biconvex lens or other optical elements capable of converting divergent light into parallel light, but the invention is not limited thereto.
Here, the projection system 100 may further include a light splitting element 113 disposed between the light source 111 and the light uniformizing element 115. In one embodiment, the beam splitting element 113 includes a first beam splitting element 113a and a second beam splitting element 113b, and the projection system 100 further includes a relay lens 114. The first light splitting element 113a and the second light splitting element 113b are arranged in parallel to each other. The relay lens 114 is disposed between the first beam splitter 113a and the second beam splitter 113 b. The light splitting element 113 is, for example, a light splitting plate glass, a dichroic mirror (e.g., a half mirror), or other optical elements with different wavelengths or colors, but the invention is not limited thereto.
The first beam splitter 113a is disposed downstream of the first, second, and third collimating elements 112a, 112b, and 112c, and the first beam splitter 113a is disposed on the transmission path of the first, second, and third light beams La, Lb, and Lc. The second light splitting element 113b is disposed on the optical path downstream of the first light splitting element 113a and the fourth collimating element 112d, and the second light splitting element 113b is disposed on the transmission path of the second light beam Lb, the third light beam Lc, and the fourth light beam Ld.
The first and second light splitting elements 113a and 113b may have wavelength selectivity. In the present embodiment, the first light splitting element 113a can reflect blue light. Therefore, the first light beam La of the blue light can be reflected to the second light source 111b through the first light splitting element 113a, so that the green phosphor layer of the second light source 111b can be excited by the blue light emitted by the blue light diode, and can also be excited by the first light beam La of the blue light, and further the second light beam Lb of the green light is output, thereby improving the light emitting efficiency. The output second light beam Lb passes through the first light splitting element 113 a. On the other hand, the third light beam Lc of the blue light may also be reflected to the second light splitting element 113b via the first light splitting element 113 a.
In this embodiment, the second light splitting element 113b can reflect the fourth light beam Ld of the red light, and let the second light beam Lb and the third light beam Lc of the other color light pass through.
An dodging element 115 is disposed optically downstream of the collimating element 112. In the present embodiment, the light homogenizing element 115 is disposed downstream of the second beam splitting element 113b and the fourth collimating element 112 d. The light uniformizing element 115 is, for example, an integrating Rod (Integration Rod), a lens array (lens array), a diffuser plate or other optical elements with light uniformizing effect, but the invention is not limited thereto.
In one embodiment, the projection system 100 may further include a relay lens 116 and a reflective element 117. The relay lens 116 is disposed downstream of the dodging element 115, and the second light beam Lb, the third light beam Lc and the fourth light beam Ld can be collected into an illumination light beam I. The reflective element 117 is disposed downstream of the relay lens 116 in the optical path, and reflects the illumination beam I to the region R. In other embodiments, the arrangement of the relay lens 116 and the reflective element 117 may be omitted. The reflective element 117 is, for example, a total internal reflection prism (TIR), a total internal reflection prism (RTIR), a mirror or other optical elements that change the traveling path of the light, but the invention is not limited thereto.
Fig. 2 is a side view of the architecture of region R in fig. 1. Referring to fig. 1 and 2, the lens 118 is disposed downstream of the reflective element 117, and the reflective element 119 is disposed downstream of the lens 118. In the present embodiment, the reflecting element 119 is a prism, which may include an incident prism 119a and an emergent prism 119 b. In addition, the prism may be a monolithic internal total reflection prism (RTIR), which is not limited in the present invention. With lens 118 being closest to light entering surface 119a1 of light entering prism 119 a. The illumination beam I is transmitted to the light valve 120 through the lens 118 and the reflective element 119 in sequence and then converted into an image beam M. The projection lens 130 is disposed downstream of the light valve 120 in the optical path to project the image beam M onto a screen (not shown). In addition, a protection sheet 122 may be disposed between the light valve 124 and the light-emitting prism 119b to protect the light valve 120.
In particular, the present invention changes the material of specific elements in the projection system to Polycarbonate (Polycarbonate). In one embodiment, the specific elements are at least one of the light uniformizing elements 115 and the reflecting elements 119 (prisms). The light uniformizing element 115 and the reflecting element 119 (prism) may be made of polycarbonate; alternatively, one of the light uniformizing element 115 and the reflecting element 119 (prism) is made of polycarbonate.
In another embodiment, the specific elements are at least one of the light uniformizing element 115, the lens 118 and the reflecting element 119 (prism), for example. The light homogenizing element 115, the lens 118 and the reflecting element 119 (prism) may all be made of polycarbonate; alternatively, one of the light uniformizing element 115, the lens 118 and the reflecting element 119 (prism) is made of polycarbonate.
In another embodiment, at least one of the first collimating element 112a, the second collimating element 112b, the third collimating element 112c and the fourth collimating element 112d is made of polycarbonate. In one embodiment, the third collimating element 112c is made of polycarbonate.
In one embodiment, the polycarbonate has a refractive index N, an Abbe number (Abbe number) V, and 1.56. ltoreq. N.ltoreq.1.6 and/or 20. ltoreq. V.ltoreq.40. Some examples of the inventionThe polycarbonate used was the one supplied by Coxikon (Makrolon)
LED2045、
LED2245、
AL2447 or
AL 2647. The special elements made of the materials can still effectively avoid the situations of yellowing and deterioration even after long-term use.
By the above embodiments, the present invention replaces the conventional manufacturing method of cyclic olefin polymer or cyclic olefin monomer copolymer with polycarbonate as the material of specific components (such as collimating element, light-homogenizing element, lens closest to the prism, and prism, etc.) with more concentrated energy density in the projection system, which can not only improve the problem of light transmittance reduction of these components under long-term irradiation, but also effectively save the cost.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A projection system, comprising:
a light source;
a collimating element disposed in the optical path downstream of the light source;
the dodging element is arranged on the downstream of the light path of the collimation element;
a prism arranged at the downstream of the light path of the dodging element;
a light valve arranged at the downstream of the prism; and
a projection lens arranged at the downstream of the light path of the light valve;
at least one of the light homogenizing element and the prism is made of polycarbonate.
2. A projection system, comprising:
a light source;
a collimating element disposed in the optical path downstream of the light source;
a dodging element and a relay lens arranged at the downstream of the light path of the collimation element;
the reflecting element is arranged on the downstream of the optical paths of the dodging element and the relay lens;
a light valve disposed downstream of the reflective element; and
a projection lens arranged at the downstream of the light path of the light valve;
at least one of the light homogenizing element and the reflecting element is made of polycarbonate.
3. The projection system of claim 2, wherein the reflective element is a prism or a mirror.
4. The projection system of any of claims 1 to 3, further comprising:
and the dichroic mirror is arranged between the light source and the light homogenizing element.
5. The projection system of any of claims 1 to 3, wherein the light source comprises a first light source, a second light source, a third light source, and a fourth light source, the collimating element comprises a first collimating element, a second collimating element, a third collimating element, and a fourth collimating element, the first collimating element is disposed downstream of the first light source in the optical path, the second collimating element is disposed downstream of the first collimating element and the second light source in the optical path, the third collimating element is disposed downstream of the third light source in the optical path, and the fourth collimating element is disposed downstream of the fourth light source in the optical path.
6. The projection system of claim 5, wherein the third collimating element is made of polycarbonate or at least one of the first collimating element, the second collimating element, the third collimating element, and the fourth collimating element is made of polycarbonate.
7. The projection system of claim 5, further comprising:
a first light splitting element arranged at the downstream of the optical paths of the first collimating element, the second collimating element and the third collimating element; and
and the second light splitting element is arranged on the downstream of the optical paths of the first light splitting element and the fourth collimating element.
8. The projection system of claim 7, further comprising:
and the lens is positioned between the light homogenizing element and the light valve and is made of polycarbonate.
9. The projection system of any of claims 1 to 3, wherein the polycarbonate has a refractive index N, an Abbe number V, and 1.56. ltoreq. N.ltoreq.1.6 and/or 20. ltoreq. V.ltoreq.40.
10. The projection system of any of claims 1 to 3, wherein the polycarbonate is manufactured using from Coltsingchun (Makrolon)
LED2045、
LED2245、
AL2447 or
AL 2647.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011309815.XA CN114518686A (en) | 2020-11-20 | 2020-11-20 | Projection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011309815.XA CN114518686A (en) | 2020-11-20 | 2020-11-20 | Projection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114518686A true CN114518686A (en) | 2022-05-20 |
Family
ID=81595469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011309815.XA Pending CN114518686A (en) | 2020-11-20 | 2020-11-20 | Projection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114518686A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1614504A (en) * | 2003-09-30 | 2005-05-11 | 卡尔蔡司耶拿有限公司 | Device for homogeneous, multi-color illumination of a surface |
| US20140042650A1 (en) * | 2011-04-29 | 2014-02-13 | Peter Mühle | Process for manufacturing a headlight lens for a motor vehicle headlight |
| CN106324964A (en) * | 2016-11-16 | 2017-01-11 | 四川长虹电器股份有限公司 | Efficient laser projection system |
| CN106468792A (en) * | 2015-08-19 | 2017-03-01 | 扬明光学股份有限公司 | Optical devices |
| CN206115128U (en) * | 2016-05-13 | 2017-04-19 | 北京闻亭泰科技术发展有限公司 | Digital light processing 3D prints optical system |
| US20180180410A1 (en) * | 2016-12-22 | 2018-06-28 | National Chung Cheng University | Method and apparatus for measuring errors of movable platform in multiple degrees of freedom |
| CN108563032A (en) * | 2018-04-16 | 2018-09-21 | Oppo广东移动通信有限公司 | Structured light projector, camera assembly and electronic equipment |
| CN108732767A (en) * | 2018-08-29 | 2018-11-02 | 深圳珑璟光电技术有限公司 | A kind of nearly eye of compact free form surface waveguide shows Optical devices |
| CN111487837A (en) * | 2019-01-25 | 2020-08-04 | 舜宇光学（浙江）研究院有限公司 | Miniature projection light engine based on D L P technology |
| CN111812934A (en) * | 2020-08-31 | 2020-10-23 | 南阳南方智能光电有限公司 | Single right-angle prism LED micro projection lighting system |
-
2020
- 2020-11-20 CN CN202011309815.XA patent/CN114518686A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1614504A (en) * | 2003-09-30 | 2005-05-11 | 卡尔蔡司耶拿有限公司 | Device for homogeneous, multi-color illumination of a surface |
| US20140042650A1 (en) * | 2011-04-29 | 2014-02-13 | Peter Mühle | Process for manufacturing a headlight lens for a motor vehicle headlight |
| CN106468792A (en) * | 2015-08-19 | 2017-03-01 | 扬明光学股份有限公司 | Optical devices |
| CN206115128U (en) * | 2016-05-13 | 2017-04-19 | 北京闻亭泰科技术发展有限公司 | Digital light processing 3D prints optical system |
| CN106324964A (en) * | 2016-11-16 | 2017-01-11 | 四川长虹电器股份有限公司 | Efficient laser projection system |
| US20180180410A1 (en) * | 2016-12-22 | 2018-06-28 | National Chung Cheng University | Method and apparatus for measuring errors of movable platform in multiple degrees of freedom |
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